210 Second Supplement to Dana’s Mineralogy. 
vhge ataslegerd Reams, Min. Not., No. 17.—Has the appearance of serpen- 
tine. 
Compact w we a -— Color genyiah,, < olive oa pistachio green ; 
streak white ; i coe what grea . G=275—2 
B. caeriniec or Fydiee. but is infusible In peat 5 ad “impactecils soluble 
beco 
and forming no jelly, ae 
Si Al “Me Ht 
33:51 15°42 2°58 3441 13°21 (of seg 0:46 lost at 100° C.) 
Affording the oxygen ratio for TH, R, #, Si, 9:12:6: 
Pyroretin [1st Suppl.].—This resin is Eppareny ai bk that described by 
Dr. Mallet under the name of Scleretin e (Phil. Mag., [4], iv, 261, and a Bi . 
Excluding the ash of the latter, Dr. ‘alles ak analysis iota « ca ites 
drogen 9°18, oxygen 11°11, and the second gives a similar ee and ‘i ed 
formula with the pyror retin. (Mallet, ina fatter to the Author. 
PyroxeneE [p. 158].—Analysis of 4 el from the Eiffel, and of a mica pseu- 
domorph after the ape by Th. Kjerul 
Si Al he Oa Mg 
“4 Augite, 50°21 6°94 759 19°85 13°66 o 33-98" 58 
2, Mica pseud., 43:10 15°05 23°25 0-81 10°82 1:50, with 
K mee Na 0°82, = poe 1:03 as impurity with the mica.} 
e fro hmatowsk according to Hermann contains (Bull. Soc. Imp. 
a Mee 1854, p- 318): 
tent 
ae Fe Oa Mg H 
1:15 1°80 gh 15°63 2:39 
Oxygen rbd 051 040 613 212 
Form of crystal « oo, 0, or in letters, J, ie ii, C 0. _Cearge a very per- 
fect, with a sub- mati indlined to vitreous lustre. 
yses of Hypersthene from a Hypersthene rock of ‘Bilesia 1 oy G. von Rath 
(Pogg., xev, cay 
si Al OFe Oa Mg ign. 
1. Black, 5178 112 1097 2004 1558  0-29=99°71. G==3336 
2. Darkgn, 50°34 -—— 847 2185 1686 1:23=98°76, G.=3249 
3. Dark gn, 50°00 042 854 2111 15°37 169=-97°63. Go=3244 
ries mis ee Ree i ot, F 187; in 2, 1:1-75; cab Be 1°85. 
Rath observes that the earlier analyses of Diallage, gi n Rammelsb 
Handvtcterboch, and ning f in bie 2nd Supplement, conduct to the same ratio. 
A soome. e from forded Si 53°60, Al 1:99, Fe 8:95, ae 
See further Enstatite 
_ On a serpentine-like pseudomorph of diopside, Kenngott, Min. mG No. 1%. 
eae = tp 50].—Note on formula of pyrrhotine, T.S. Hunt. This Journal, 
[2], xix, 
145). —Density to Deville coe heating 2°663 
sion 2-220, own a diminution em girs, Ma In a similar manner labrado ide ‘hows 
tances a diminution of 0:06, ie of 0°08, hornblen ie 
of 0-12, pyroxene ie of 0:14, iron chrysolite of 0°16. ‘Corundum 4:022 before fusion, 
3992 after fusion. 
on nage crystallization of quartz, by M. Descloizeaux, Acad. Sei., May, 
1855, rei great Ts containing figures and tg riptions of numerous new 
erys iF Leyate gg ote a notice in this Jour., xx 
: blished ne Wien, xv, 59 an 
structure of quartz ceyttalp ss he developed by the 3) a of Phnwrollaorle wl acid, Pau 
‘rated ‘by plates and 
of uartz, Kenngott, Min, Not, No, 15. 
in California, Am. J. Saar Meadors 
hopper-shaped crystals, &e., Néggerath, Verh. nat. Ver. Bonn, 
corre [p. 200].—Measuroments by Kokscharov (Min. Rusel, ii, 110), 0:2= 
38’. 0: p, 200] Men ty ¢ 
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